First off, I'm no expert on physics, but I'll give it a go.

Yes, there is a relation. The lighter the arrow the faster will be its initial velocity (However, the downrange velocity will vary depending on the arrow's profile).

Beyond that there are other considerations which physics can't account for... the human element! That is the faster your arrows fly, the less room there will be for error.  That is, the bow becomes less forgiving of imperfections in your execution of the shot.

There's an old saying in the archery world... "It's better to have a slow 10, than a fast 7." So, unless you are certain that your execution is rock solid, I would recommend that you 1). First check to see that your arrows are properly matched to your draw weight and that they are not so out of tune that you can't bring them within an acceptable range. 2) Try a more forgiving set-up, which might include lower poundage, or heavier arrows, or a combination of both, and a slightly higher brace height. 3) Anytime you make significant changes to the setup of your equipment, such as changing arrows or changing limbs, it will require that you also re-tune your bow.

Refer to the Easton tuning guide for more details on tuning.

Best of luck,

-Daniel Perez
Archery Coach

--- In AskArcheryCoach@yahoogroups.com, Adil Jdidi <adiljdidi@...> wrote:
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> Hi all,
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> is there any relation between arrow weight and limbs power, i have a case when i increased a limbs power , keeping a light weight arrow, i lost in precision.
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> Thanks in advance
>
> Adil
>
> FAR club - Morocco
>
>
>
>
>
>
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